>
> - disk cache settings (EnDskCache - for SSD should be on or you're going
> to lose 90% of your performance)
>
Disk cache is enabled, I know there is a huge performance impact.
> - OS settings e.g.
>
> echo noop > /sys/block/sda/queue/scheduler
> echo 975 > /sys/block/sda/queue/nr_requests
>
>
> I have a beast of a Dell server with the following specifications:
> • 4x Xeon E5-4657LV2 (48 cores total)
> • 196GB RAM
> • 2x SCSI 900GB in RAID1 (for the OS)
> • 8x Intel S3500 SSD 240GB in RAID10
> • H710p RAID controller, 1GB cache
> Centos 6.6, RAID10 SSDs u
On Wed, Dec 10, 2014 at 2:30 AM, Strahinja Kustudić
wrote:
> On Wed, Dec 10, 2014 at 4:55 AM, Mark Kirkwood
> wrote:
>>
>> That is interesting: I've done some testing on this type of card with 16
>> (slightly faster Hitachi) SSD attached. Setting WT and NORA should enable
>> the so-called 'fastpa
On 10/12/14 21:30, Strahinja Kustudić wrote:
On Wed, Dec 10, 2014 at 4:55 AM, Mark Kirkwood <
mark.kirkw...@catalyst.net.nz> wrote:
That is interesting: I've done some testing on this type of card with 16
(slightly faster Hitachi) SSD attached. Setting WT and NORA should enable
the so-called 'f
On Wed, Dec 10, 2014 at 4:55 AM, Mark Kirkwood <
mark.kirkw...@catalyst.net.nz> wrote:
> That is interesting: I've done some testing on this type of card with 16
> (slightly faster Hitachi) SSD attached. Setting WT and NORA should enable
> the so-called 'fastpath' mode for the card [1]. We saw per
On 10/12/14 12:28, Strahinja Kustudić wrote:
* These tests are with the H710p controller set to write-back (WB) and
with adaptive read ahead (ADRA). I ran a few tests with
write-through (WT) and no read ahead (NORA), but the results were worse.
That is interesting: I've done some tes
I have a beast of a Dell server with the following specifications:
- 4x Xeon E5-4657LV2 (48 cores total)
- 196GB RAM
- 2x SCSI 900GB in RAID1 (for the OS)
- 8x Intel S3500 SSD 240GB in RAID10
- H710p RAID controller, 1GB cache
Centos 6.6, RAID10 SSDs uses XFS (mkfs.xfs -i size=512
